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Published on: February 23, 2024
Do long-term changes in relative maxillary arch width affect buccal-corridor ratios in extraction and nonextraction
Sercan Akyalcin1, Aslihan Ertan Erdinc, Banu Dincer
1Department of Orthodontics, The University of Texas/Houston Dental Branch, Houston, TX, USA. sercan.akyalcin@uth.tmc.edu
Summary
Orthodontic premolar extraction treatment did not narrow maxillary arches long-term. Nonextraction treatment led to slight maxillary arch expansion, with posterior width decreasing post-retention.
Area of Science:
- Orthodontics
- Dental Arch Dimensions
- Maxillary Arch Analysis
Background:
- Evaluating long-term maxillary arch width changes is crucial in orthodontics.
- Understanding the impact of premolar extractions on arch dimensions is essential for treatment planning.
Purpose of the Study:
- To assess long-term maxillary arch width alterations in patients treated with and without premolar extractions.
- To investigate potential correlations between extraction treatment and buccal-corridor ratios.
Main Methods:
- Digitized dental casts from 34 extraction and 32 nonextraction Class I malocclusion patients.
- Measurements taken at pre-treatment, post-treatment, and post-retention (average 5 years).
- Statistical comparison of arch width changes between groups.
Main Results:
- Maxillary arch widths remained stable post-extraction therapy and retention.
- Nonextraction treatment showed significant maxillary arch expansion (1.37-2.05 mm).
- Posterior arch width decreased significantly post-retention in the nonextraction group.
Conclusions:
- Premolar extraction orthodontic treatment does not result in narrower long-term maxillary arches.
- Nonextraction orthodontic treatment is associated with slight maxillary arch expansion.
- Posterior arch width may decrease during the retention phase.
